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Stereo 20W Class D Audio Amplifier - MAX9744 (ID: 1752)

SKU 1816
3 reviews
£19.86 inc VAT
£16.55 ex VAT
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Available for backorder (more info)

This 20W stereo amplifier is a slim board that has a class D amplifier onboard that can drive 2 channels of 4-8 ohm impedance speakers at 20W each. Power it with 5-12VDC using the onboard DC power jack and plug the stereo line level into the 3.5mm stereo headphone jack and jam out with ease.

Since it's class D, it's completely cool-running, no heat sinks are required and it's extremely efficient - up to 93% efficiency makes it great for portable or battery powered rigs.

The MAX9744 amplifier is very easy to use and has both analogue and digital volume control capability. Use a single 1KΩ pot (included) to adjust volume analogue-style or hook it up to a microcontroller and send I2C commands to set 64-steps of volume amplification.

The MAX9744 has been mounted into a breakout, with polarity protection, jacks and terminal blocks, i2c level shifting, and a spot to solder in a volume potentiometer. Each order comes with one MAX9744 breakout board with all surface-mount parts fully assembled and tested, 3 x 2pin and 1 x 3pin terminal blocks, a 470uF power filter capacitor and a 1KΩ trim potentiometer.

Please Note: 

  • To use this board, a little soldering is required to attach the terminal blocks and other components, but it's fairly easy and expected it should take less than 15 minutes.
  • Power from 4.5V-14V DC voltage
  • Up to 93% efficient (88-93% typical)
  • 20mA quiescent current (or put into shutdown for 1uA quiescent)
  • Up to 29.5dB max gain
  • Use DC or AC coupled line-level input, up to 3Vpp
  • Filterless Spread-Spectrum Modulation Lowers
  • Radiated RF Emissions from Speaker Cables
  • 20W Stereo Output (4Ω, VDD = 12V, THD+N = 10%)
  • Low 0.04% THD+N
  • Integrated Click-and-Pop Suppression
  • Short-Circuit and Thermal-Overload Protection
  • Dimensions (without 0.1" header or terminal blocks): 54mm x 41mm 2mm / 2.1" x 1.6" x .08"
  • Weight: 11g